Pref service: have Mash and Chrome connect to the right pref stores

chrome/browser/prefs/browser_prefs.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_PREFS_BROWSER_PREFS_H_
 #define CHROME_BROWSER_PREFS_BROWSER_PREFS_H_
 
+#include <set>
+
 #include "build/build_config.h"
+#include "components/prefs/pref_value_store.h"
 
 class PrefRegistrySimple;
 class PrefService;
 class Profile;
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 namespace chrome {
@@ skipping 18 matching lines @@
 // away (even if it becomes an empty call for some time) as it should remain
 // *the* place to drop deprecated browser prefs at.
 void MigrateObsoleteBrowserPrefs(Profile* profile, PrefService* local_state);
 
 // Migrate/cleanup deprecated prefs in |profile|'s pref store. Over time, long
 // deprecated prefs should be removed as new ones are added, but this call
 // should never go away (even if it becomes an empty call for some time) as it
 // should remain *the* place to drop deprecated profile prefs at.
 void MigrateObsoleteProfilePrefs(Profile* profile);
 
+// The pref stores Chrome expects to exist.
+std::set<PrefValueStore::PrefStoreType> ExpectedPrefStores();
+
+// The pref stores Chrome creates in-process (and thus doesn't need to connect
+// to through the pref service).
+std::set<PrefValueStore::PrefStoreType> InProcessPrefStores();
+
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_PREFS_BROWSER_PREFS_H_